Xcaper filters restrict the flow of air when you breathe*, this can cause problems for people who already have heart or lung problems.

USE AT YOUR OWN RISK

*That being said it is important to understand that you need to balance the health effects of a small restriction in airflow, against the health effects of inhaling fine particles deep in to your lungs, as well as the damaging and irritating effects of the toxic gases in smoke that are removed by this mask.